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Notes on Central American Rubiaceae
Vol 18, Page 5, Date 1928
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Twelve new American Asteraceae
Vol 18, Page 25, Date 1928
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A caddis case of leaf pieces from the Miocene of Washington
Vol 18, Page 60, Date 1928
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New marine mollusks from Ecuador
Vol 18, Page 66, Date 1928
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The screw-nemas, Ascarophis van Beneden, 1871; parasites of codfish, haddock and other fishes
Vol 18, Page 96, Date 1928
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Prehistoric ornithology in North America
Vol 18, Page 145, Date 1928
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A cotylosaur from the Upper Triassic of western Texas
Vol 18, Page 177, Date 1928
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New plants from Central America. - XII
Vol 18, Page 178, Date 1928
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Two new cave-beetles related to Anophthalmus pusio Horn
Vol 18, Page 194, Date 1928
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Ungella secta n. gen., n. sp.; a nemic parasite of the Burmese Oligochaete (earthworm), Eutyphoeus rarus
Vol 18, Page 197, Date 1928
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The grass genus Schizachne
Vol 18, Page 203, Date 1928
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Ethnobotany - Remedial plants of Tepoztlan: A Mexican folk herbal
Vol 18, Page 216, Date 1928
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Again on Pleistocene Man at Vero, Florida
Vol 18, Page 233, Date 1928
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Characters of the brachiopod genus Lingulidiscina Whitfield
Vol 18, Page 241, Date 1928
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A new species of the nemic genus Syringolaimus; with a note on the fossorium of nemas
Vol 18, Page 249, Date 1928
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New plants from Central America. - XIII
Vol 18, Page 273, Date 1928
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A new locality for Fox Hills fossils in Colorado
Vol 18, Page 305, Date 1925
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New Cretaceous mollusks from Colorado and Utah
Vol 18, Page 306, Date 1928
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A new tree fern from Haiti
Vol 18, Page 316, Date 1928
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Insect Damage to Yellow and White Pine Timbers in the Roof of the White House
Vol 18, Page 381, Date 1928
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Characteristic mammals of the early Pleistocene
Vol 18, Page 421, Date 1928
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A new species of Bear from the Pleistocene of Florida
Vol 18, Page 430, Date 1928
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New South American species of Diplostephium
Vol 18, Page 485, Date 1928
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A new gastropod from the Miocene of Virginia
Vol 18, Page 561, Date 1928
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Mosses of western Mexico collected by Mrs. Ynes MexÃa
Vol 18, Page 577, Date 1928